OSPW KACTUS CERAMIC 17TH PULLEY WHEEL SYSTEM FOR SHIMANO R9100 R8000 - Black

Ready Warna Black amp; Red High Quality Stylish Design 17T All Set Carbon Fiber Derailleur Pulley Product description *12/17T super large size guide wheel set system *Saves 45% chain friction resistance compared to 11T guide wheels *Ceramic bearing version saves more than 2.2 watts of average power compared to the original transmission system *Full carbon fiber cage *Full 7075 aluminum alloy CNC cutting lightweight guide wheel and TC4 titanium alloy spindle...